In my 'Documents' folder (Win7) I have two folders with names that appear in Explorer to be identical, though their contents are different. I can rename them both to something else (eg: 'Test') and Explorer doesn't complain. The dir listing that cmd.exe and powershell gives me only lists one of them, but also lists this suspicious entry:

20/04/2010  12:16 PM    <DIR>          ????

Even if I rename the folders to have unique names, one of them still shows up as ???? in cmd.exe. Desktop.ini in my Documents folder doesn't contain anything out of the ordinary. Both folders appear to be read-only in their properties panel, and if I untick the read-only box it will ask me if I want to apply the action recursively, but either way when I close the panel and open it again the folder is once again read-only. They are both set to not inherit permissions.

The folder that shows up correctly in the cmd.exe dir listing is the "real" one, the other seems to be automatically created when a program tries to access it. How is this possible?This is driving me nuts!